As the world strives towards net-zero carbon emissions, heat storage plays a crucial role in transforming energy systems. Given that renewables are intermittent (solar panels don’t produce energy at night, and wind turbines stop when the wind dies down), heat storage helps bridge this gap, providing a steady, reliable energy supply when renewables are unavailable.
Heat storage also improves the efficiency of energy use in industrial and domestic heating systems. Buildings and factories account for a large share of global energy consumption, and efficient heat storage systems, such as thermal batteries or district heating grids, can reduce energy waste and enhance the use of renewables in heating.
Greenbackers is pleased to support Caldera, UK-based in Hampshire, who develops and sells high-capacity Storage Boilers powered by renewable electricity to generate and store heat, helping industries decarbonize heat production using natural and recycled materials.
Why Caldera:
- Innovative technology: Caldera’s heat storage system uses volcanic rock and recycled aluminium, offering a scalable, low-cost energy storage solution. Their IP-protected technology provides exceptional heat retention, storing energy for weeks, outperforming alternatives like biomass or hydrogen. This enables manufacturers to transition away from fossil fuels, lowering both energy costs and carbon emissions while maintaining a consistent heat supply.
- Commercial traction: Caldera has already secured over £10 million in funding, including grants and equity investments. With extensive R&D and strong customer feedback, the company is on track to secure its first commercial orders within the next quarter. They project £280 million in annual revenue by 2032.
- Market potential: Industrial heat is essential to global manufacturing, but still largely powered by fossil fuels. Caldera’s patented Storage Boilers address this by offering renewable, on-demand heat for industrial processes below 200°C. This taps into a £96 billion global market for industrial heat equipment. Despite a soft launch, Caldera is already receiving very strong inbound interest, particularly from engineering companies tasked with designing zero-carbon solutions.
Investment Snapshot:
- Type: Series A
- Target amount: £10m
- Minimum contribution: £500k
For further information or to speak with Caldera directly contact: Annika Borrmann at [email protected]
